Title says it all, we all know this and hate it. At ranked you dont even see that much toxicity, everyone are quite chill there but once and a while people snap and are toxic, but unranked in the other hand.. Oh my. Everyone got extremly big ego, taking the match way too seriously, like it would be some challenger game or worlds.. Even at 1 death people ( mostly mid mains ) are looking for someone to flame, people are toxic mostly for not even a good reason, people flaming others for couple deaths, unranked is just a nightmare..
It's after all meant for learning new champs, mechanics or just go there and take it easy when you dont wanna be tryhard at ranked games.
I hope people would understand this and chill out at unranked games, maybe riot could do something about this, maybe have some kinda "loading tip" about taking it chill on unranked games.
And blind pick is just a worst nightmare, there is always those 2 yasuo's who are saying "ez", "lucky", "kid", "noob" etc. It feels like blind pick and draft pick is meant for younger audience and ranked for older audience.
If you're having a tilting game take a break, eat something, watch something and maybe go for a walk / shower or play something else, and if you find yourself acting toxic at unranked, remember that people go there to learn new champions and aren't tryharding mostly.